The latest high-end smartphone from Motorola has all the usual attributes you’d expect from such a device: It’s very fast, its screen looks good, its cameras are capable of taking nice photos, and it has a razor-thin frame. Better yet, unlike many of its premium rivals, the Z2 Force's display is particularly resistant to cracks.

But nailing the essentials simply isn’t enough to guarantee sales in today’s saturated, top-heavy smartphone market. Motorola knows that. So how do you get the highest return from your $720 device?

Motorola’s answer is to sell accessories alongside the phone itself. The Lenovo-owned company last year introduced Moto Mods, a line of add-ons that snap onto the back of its Moto Z phones. They worked well with last year’s Moto Z, and they continue to work well on the Z2 Force.

But just because they work well doesn't mean they are worthwhile. Motorola has thrown all its eggs in the Moto Mods basket this year, but in doing so, the company is chasing a fantasy that’s both expensive and impractical. Combine that with a few unfortunate design choices, and you have one of the most baffling flagship phones of the year.

The Moto Z2 Force’s design is kind of a mess.

It’s sturdily put together, but the large borders above and below the display immediately look dated compared to the wide screens of Samsung's Galaxy S8, LG's G6 and other expensive phones.

The bottom bezel is home to a fingerprint scanner and the Moto logo. But the scanner doesn’t act as a home button by default, which means you’ll have a big bezel and onscreen buttons chewing up space until you mess around with Moto’s software settings.

On top of that, the Z2 Force isn't fully water-resistant. Motorola says the phone can survive a slight splash or two, but anything more and it’ll be at risk. Rivals like the Galaxy S8 and G6 offer better protection.

The back of the device looks uneven.

Jeff Dunn/Business Insider

The back is made of a nice brushed aluminum, which feels suitably high-end. But it’s tarnished by a protruding camera bump, an odd gray-on-gray border around the phone’s edges that houses its antennas, and an unsightly set of Moto Mod connector pins. And the fact that the phone is too wide and large to be comfortable to use with one hand doesn’t help.

The worst part is that Moto gave itself no choice with the design. The phone looks a lot like last year’s Moto Z because it has to work with every Mod. Those accessories are built to fit that specific shape and use those particular connector pins.

And because the Mods connect on the back, Moto has to keep the fingerprint scanner on the front, which leaves at least one big bezel. If Motorola tried to change the design, it would risk alienating everyone who bought Mods in the past. It’s basically boxed itself in.

The one striking thing about the Z2 Force is how thin it is.

The phone is just 0.24 inches thick. By comparison, the iPhone 7 Plus is 0.29 inches, while the Samsung Galaxy S8 is 0.31 inches. Last year’s Moto Z was similarly slim, but the Z2 Force still feels like an impressive feat of engineering.

But the phone's thinness has some downsides.

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While that thinness is impressive, it hampers the phone in other ways.

Thanks to its svelte design, the Z2 Force — just like its predecessor, last year's Z — doesn't have room for a headphone jack. This hasn’t gotten any less irritating over the past year. Bluetooth headphones still have problems, headphones that can plug directly into USB-C ports are still rare, and having to use a dongle to connect traditional headphones is still aggravating.

The phone's slim case also means that the Z2 Force’s speakers are anemic. You’ll have to be in a quiet, closed space to be able to take a call over its speakerphone. And don’t expect it to play music with good volume either. There simply isn’t enough space for the speakers to resonate.

Being extra-thin also means having less space to fit a battery.

Jeff Dunn/Business Insider

As a result, the Z2 Force’s battery life is just average. Its 2,730 mAh battery pack will get you through a day of typical use, but that’s it. Thankfully, it charges quickly.

But I can’t think of anyone who’d willingly trade a longer-lasting battery for a phone that’s half an inch thinner. Have you ever heard anyone say their iPhone was too thick?

But, again, blame the Mods for the Z2 Force's skinny design.

Some of the Moto Mods, which snap on to the back of the Z2 Force. From left, a JBL external speaker, a battery pack, and a case with a 360-degree camera.Jeff Dunn/Business Insider

Motorola needs the Z2 Force to be this slim so the phone doesn't become unwieldy when you attach a Mod.

Among the Mods are a charging case and an external speaker. Buy those, though, and you’re paying extra to fix deficiencies caused by the needlessly thin design. It’s hard not to feel like Motorola built the Z2 Force with the idea of selling accessories in mind.

You can check out the full list of Moto Mods here. Few of them make much sense. Who wants to carry something extra around? Why buy an $80 speaker that works with only one phone when you could get a Bluetooth speaker that works with just about any phone? In what situation would you need a $300 mini-projector that can’t play anything in high definition?

Meanwhile, the $300 Hasselblad camera Mod has received middling reviews. The new game controller Mod is exclusive to Verizon. And I’m still not convinced that 360-degree cameras are something consumers actually want, let alone something they'll pay $300 to use when they work with only one phone.

The battery pack Mod makes some sense, but it doesn’t hold a lot of charge, and you can find lots of other external batteries that will work with any device, not just one of the Z models.

The least offensive option is probably a case that adds wireless charging. But other phones have wireless charging built-in; you don't have to buy a $40 accessory to get it.

The Z2 Force’s other signature feature is its durable display.

Jeff Dunn/Business Insider

Motorola coats the screen in layers of plastic, which make it extremely difficult to crack.

I smashed it against railings and desks, purposefully dropped it onto the concrete, and threw it across my apartment. Each time, the 5.5-inch panel came away in one piece. Having that extra security is great.

But it too has a downside — it’s extremely prone to scratches.

The scuffs along the bottom left edge are immediately noticeable. If you look closely you can see other scratches around the bottom bezel.Jeff Dunn/Business Insider

You can get an idea from the image above. Even before I roughed it up, the Moto Z2 Force started scuffing from everyday wear and tear.

You do not want to put this phone in the same pocket as your keys. Again, in trying to solve one problem (in this case, breakable glass), Motorola has created an even bigger one.

It’s not like Motorola is unaware of this, either. When the company has used similar displays on previous phones, they each had a removable top layer that could be replaced if it got too rough.

But that option no longer exists. Instead, with the screen on the Z2 Force, Motorola fused the plastic to the device itself — a move that helps make the phone thinner.

If you can ignore the scratches, the Z2 Force’s display is superb.

What the Z2 Force looks like with the 360-degree camera Mod attached.Jeff Dunn/Business Insider

It’s nice and bright, which makes it easy to read outdoors, and it doesn’t wash out if you aren’t looking at it head-on. It’s the kind of display you’d expect from a top-tier smartphone.

Likewise, the Moto Z2 Force has zero issues with performance.

What the Z2 Force looks like with its JBL speaker Mod attached.Jeff Dunn/Business Insider

It runs on an Snapdragon 835 chip, the most powerful on the market, and it has 4 GB of RAM. The phone can get a little bit warm if you play games on it for too long, but there is very little it can’t do quickly and smoothly.

Storage space isn’t an issue either. You get a hearty 64 GB by default, and you can add more via its microSD slot.

Motorola also continues to nail it on the software front.

The speaker Mod does make the phone much thicker, though.Jeff Dunn/Business Insider

Just like with its more affordable Moto G5 Plus and Moto E4 phones, Motorola did very little to alter Google’s standard version of Android that it uses on the Z2 Force. That version of Android is already clean and easy to manage.

The changes Motorola did make are often genuinely useful. You can twist the phone twice to quickly launch the camera app, for instance. This approach helps the phone stay especially smooth to use.

Like the iPhone 7 Plus and LG G6 before it, the Moto Z2 Force has a dual-camera system.

It looks kind of like a smiley face...Jeff Dunn/Business Insider

There’s a pair of 12-megapixel sensors on the back of the device — one a standard color camera, the other monochrome.

The cameras give you some new shooting options.

A photo shot with Z2 Force's depth-of-field effect, before the effect is applied...Jeff Dunn/Business Insider

The monochrome camera allows the phone to take "true" black and white photos, for one. Used together with the color camera, it also allows the Z2 Force to offer a depth-of-field effect similar to the "portrait mode" on Apple's iPhone 7 Plus.

Black-and-white photos shot with the Z2 force look gorgeous. Sadly, its version of "portrait mode" is hit-or-miss. You generally need your subject to stand still for it to work. Even then, the camera often blurs out portions of the object or person you're focusing on.

...and after. Notice the loss of sharpness on the bottle itself.Jeff Dunn/Business Insider

Overall, the Moto Z2 Force’s camera system is good but not great.

Jeff Dunn/Business Insider

It's a level below the upper echelon of smartphone cameras that's occupied by those in the Galaxy S8, Google's Pixel, and HTC's U11.

The Z2 Force's camera system takes detailed, well-exposed shots in good lighting outdoors, with accurate colors. Like most of its peers in the $700 range, it's totally capable of producing something gorgeous. Its camera system focuses quickly too, although other smartphone cameras are faster.

It struggles to take good pictures when there's not a lot of natural light.

Jeff Dunn/Business Insider

Photos start to lose details once you bring the Z2 Force indoors, even in adequate lighting. And at night, it simply can’t match the color accuracy and brightness of rival phones. Noise abounds.

The Z2 Force's camera is still good, but Motorola is charging too much for it not to be great.

Here’s a few more sample shots:

Jeff Dunn/Business Insider

Jeff Dunn/Business Insider

Not great.Jeff Dunn/Business Insider

So, I can’t recommend the Moto Z2 Force.

Jeff Dunn/Business Insider

I give Lenovo and Motorola credit for at least trying something different. But modular accessory systems remain a bad idea, and the Z2 Force's shatterproof display is marred by its extreme susceptibility to scratching.

Everything the Z2 Force does well can be found on other phones with better cameras, smarter designs, and/or longer battery life. Go with Samsung's Galaxy S8 or LG's G6 instead.